Perfusion catheter with coil supported inner tubular member

Claim 1

A perfusion balloon catheter configured for slidable movement over a guidewire, comprising: a) an elongated catheter shaft having a proximal end, a distal end, a port in the distal end larger in transverse dimensions than transverse dimensions of the guidewire, a guidewire lumen extending within the elongated catheter shaft in fluid communication with the port in the distal end, an inflation lumen extending within the catheter shaft to a location spaced proximal to the distal end; b) a balloon on a distal shaft section of the elongated catheter shaft having an interior in fluid communication with the inflation lumen; c) a proximal portion of the distal shaft section which has a plurality of longitudinally disposed perfusion ports located proximal to the balloon in fluid communication with the guidewire lumen; d) a cylindrically shaped distal portion of the distal shaft section located distal to the balloon; having a plurality of perfusion ports spaced proximal to the distal end in fluid communication with the guidewire lumen; and e) a tubular member which extends through the interior of the inflatable balloon, which has a wall defining at least a portion of the guidewire lumen extending therein with inner and outer surfaces and a polymer matrix therebetween, which has an expanded helical metallic ribbon coil incorporated within the polymer matrix having an interturn spacing of about 0.005 to about 0.030 inch (0.1-0.76 mm) and which has a distal extremity secured to the distal skirt of the balloon.